Table 3.

Bacterial diversity indices (Chao1, PD whole tree and Observed species) measures for the nasopharyngeal (NPS) and bronchoalveolar lavage (BAL) samples in clinically healthy feedlot calves

Calves group	Chao1 index	PD whole tree	Observed species
NPS	32.07 ± 9.35	2.77 ± 1.41	29.65 ± 8.32
BAL	28.75 ± 10.14	2.52 ± 1.03	24.22 ± 9.36

The data are presented as the mean ± standard deviation. There was no statistically significant difference in different bacterial diversity indices between the upper and lower respiratory tract P value >0.05